RouteVerdict

The trust layer for x402 itself. Before an agent pays an unfamiliar x402 endpoint, it pays $0.05 to ask RouteVerdict first: is it alive, what does it charge, is its discovery schema real, is it cataloged — and has anything changed since last time? No accounts, no API keys: payment is the authentication.

Live on Base mainnet x402 v2 · exact scheme $0.05 USDC / check Observation only — never pays the target

What a check returns

One POST /v1/check with a resource URL returns:

a verdict — TRUSTED, CAUTION, or AVOID — with a 0-100 trust score and every deduction itemized
liveness — the endpoint probed live, unpaid: HTTP status, latency, whether its 402 parses as valid x402
terms — price, network, asset and payTo from the live challenge
schema quality — whether the Bazaar discovery output schema types real fields or is hollow ({"type", "example"} only — the shape 87.8% of listings ship)
catalog presence — listed in the CDP Bazaar? In the PayAI index? (a failed lookup reports unknown, never a fabricated "not listed")
diff — what changed since the previous check of the same URL: price, payTo, schema score, listing presence, liveness

How to call it

curl -X POST https://route-verdict-production.up.railway.app/v1/check \
  -H 'content-type: application/json' \
  -d '{"resource_url":"https://some-service.example.com/v1/endpoint"}'

Unpaid calls return an HTTP 402 x402 challenge. Pay $0.05 USDC on Base with any x402 v2 client, retry with the payment header, and the report comes back. There is no signup and no key to manage — the settlement is the credential.

Endpoints

Route	Price	Purpose
`POST /v1/check`	$0.05	Trust & liveness check for one x402 resource URL (paid, x402)
`GET /quote`	free	Price, asset, network, pay-to wallet
`GET /.well-known/x402`	free	Machine-readable service manifest
`GET /skill.md`	free	Documentation written for agents
`GET /llms.txt`	free	Compact agent index
`GET /health`	free	Liveness

Source code: github.com/QuincyGB/route-verdict (public source — the scoring is deterministic and fully inspectable, and the test suite ships with it). Sibling service: Token Verdict, risk verdicts for token contracts.

Honest limits: RouteVerdict reads what an endpoint publishes and what the public catalogs hold. It never settles a test payment to the target, does not grade the paid payload's quality, and cannot see inside the target's wallet — the diff flags payTo changes, it does not explain them.